Shelf



FIG. 1 is a front perspective view of the shelf; and

FIG. 2 is a bottom perspective view thereof; and

FIG. 3 is a front plan view thereof; and

FIG. 4 is a rear plan view thereof; and

FIG. 5 is a left side view thereof; and

FIG. 6 is a right side view thereof; and

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a top view thereof.

Wherein the broken lines herein illustrate environment only and do not form a portion of the claimed invention. 

CLAIM The ornamental design for the shelf, as shown and described. 